diff --git a/main/tracking/courseLog.php b/main/tracking/courseLog.php
index 1c7cb920cf..678dc3fe3e 100644
--- a/main/tracking/courseLog.php
+++ b/main/tracking/courseLog.php
@@ -937,20 +937,25 @@ function get_addtional_profile_information_of_field_by_user($field_id, $users){
 				if (!empty($row['field_value'])) {
 					if ($result_extra_field['field_type'] == USER_FIELD_TYPE_DOUBLE_SELECT) {
 						$id_double_select = explode(';',$row['field_value']);
-						$value1 = $result_extra_field['options'][$id_double_select[0]]['option_value'];
-						$value2 = $result_extra_field['options'][$id_double_select[1]]['option_value'];
-						$row['field_value'] = ($value1.';'.$value2);
+						if (is_array($id_double_select)) {
+							$value1 = $result_extra_field['options'][$id_double_select[0]]['option_value'];
+							$value2 = $result_extra_field['options'][$id_double_select[1]]['option_value'];
+							$row['field_value'] = ($value1.';'.$value2);
+						}
 					} else if ($result_extra_field['field_type'] == USER_FIELD_TYPE_DATE) {
-						$datetime = explode(';',$row['field_value']);						
-						$time = mktime(0,0,0,$datetime[1],$datetime[0],$datetime[2]);
-						$row['field_value'] = date('Y-m-d',$time);						
+						$datetime = explode(';',$row['field_value']);	
+						if (is_array($datetime)) {					
+							$time = mktime(0,0,0,$datetime[1],$datetime[0],$datetime[2]);
+							$row['field_value'] = date('Y-m-d',$time);	
+						}					
 					} else if ($result_extra_field['field_type'] == USER_FIELD_TYPE_DATETIME) {
-						$datetime = explode(';',$row['field_value']);						
-						$time = mktime($datetime[3],$datetime[4],0,$datetime[1],$datetime[0],$datetime[2]);
-						$row['field_value'] = date('Y-m-d H:i:s',$time);												
+						$datetime = explode(';',$row['field_value']);
+						if (is_array($datetime)) {						
+							$time = mktime($datetime[3],$datetime[4],0,$datetime[1],$datetime[0],$datetime[2]);
+							$row['field_value'] = date('Y-m-d H:i:s',$time);
+						}												
 					} 
-				}
-				
+				}				
 				$return[$row['user_id']][] = $row['field_value'];
 			}
 		}